US20160000523A1 - Dental handpiece nozzle - Google Patents
Dental handpiece nozzle Download PDFInfo
- Publication number
- US20160000523A1 US20160000523A1 US14/772,612 US201414772612A US2016000523A1 US 20160000523 A1 US20160000523 A1 US 20160000523A1 US 201414772612 A US201414772612 A US 201414772612A US 2016000523 A1 US2016000523 A1 US 2016000523A1
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- United States
- Prior art keywords
- nozzle
- mixture
- injection port
- face
- notch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
- A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
- A61C3/025—Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/087—Supplying powder or medicines
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
- A61C17/02—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
- A61C17/0202—Hand-pieces
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
- A61C17/02—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
- A61C17/022—Air-blowing devices, e.g. with means for heating the air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
- B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
- B05B1/267—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being deflected in determined directions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
Definitions
- the present invention relates to a nozzle for a dental handpiece, in particular, a nozzle for a dental handpiece of a type wherein a nozzle is attached to a handpiece body at its nozzle connection port for injection of a mixture of air and powder together with water.
- Dental handpieces are known, which mix air and powder for polishing or cleaning tooth surface, and inject the mixture together with water onto the tooth surface.
- Dental handpieces of this type are known, for example, from Patent Publication 1, wherein the dental handpiece is composed of a handpiece body and a nozzle.
- the handpiece body has a container for accommodating powder, an air supply line for supplying air into the container, a mixture transfer line for transferring a mixture of the powder and air to a nozzle, a water supply line for transferring water to the nozzle, and a head (nozzle connector portion) on which the nozzle is attached.
- the nozzle has a line and an injection port for each of the mixture and the water for separate injection thereof.
- the nozzle is inserted onto and fit on the head at the tip of the handpiece body, so that the line and the injection port for each of the mixture and the water through the nozzle are brought into communication with the corresponding mixture transfer line and water supply line in the handpiece body.
- the mixture of air and powder supplied through the handpiece body is adapted to be injected together with water through the nozzle.
- a nozzle for injecting a mixture of air and powder together with water there is known a nozzle for use in subgingival treatment, such as disclosed in Patent Publication 2.
- a nozzle for subgingival treatment has a connector portion connected to a handpiece body, and a nozzle body extending from the connector portion toward the end, gradually tapering into a thin and flat form.
- a channel for transferring a mixture of air and powder and a channel for transferring water are separately provided, extending from the connector portion toward the end of the nozzle body, and a mixture injection port and a water injection port for separately injecting the mixture and water are respectively opened in the end of the nozzle body.
- Examples of a commercial product that are in practical use for general dental or medical institutions include a nozzle entirely made of a resin and 1.62 mm wide and 0.78 mm thick in its end, or a nozzle entirely made of metal and 1.95 mm wide and 0.91 mm thick in its end.
- nozzles are connected to the nozzle connector port of the handpiece body by means of various securing means, such as of an insertion or screwing type, so as to transfer water and the mixture of air and powder supplied through the handpiece body through the lines in the nozzle respectively assigned to the water and the mixture, for injection through the respective injection ports during subgingival treatment, as discussed above.
- various securing means such as of an insertion or screwing type
- Patent Publication 1 JP-H10-286268-A
- Patent Publication 2 JP-2008-149138-A
- the nozzles of this type for use in the subgingival treatment are, as discussed above, formed thin and flat, and the mixture channel and the water channel formed through the nozzle are respectively opened in the nozzle end to form a mixture injection port and a water injection port.
- the present invention aims to solve such problems of the prior art. It is an object of the present invention to provide a nozzle for a dental handpiece of this type, wherein the nozzle, when inserted into a tiny gap between the subgingival tooth surface and the gum for injection of a mixture of air and powder in subgingival treatment, may properly inject the mixture onto a treatment site, and efficiently discharge subgingivally the mixture injected subgingivally, to thereby improve work efficiency in dental treatment.
- a nozzle for a dental handpiece wherein said nozzle is to be connected to a handpiece body for injection, together with water, of a mixture of air and powder supplied through the handpiece body, said nozzle comprising:
- a connector portion to be connected to a handpiece body
- a nozzle body extending from said connector portion and having a front face, a rear face, two lateral faces, and an end, said nozzle body being provided near said end with a notch of a substantially rectangular section cut out from said front face into said lateral faces, said notch forming an upstream face and a downstream face,
- said nozzle has a channel and an injection port thereof for transferring the mixture and a channel and an injection port thereof for transferring water, separate from each other, said channel for the mixture extending through the nozzle body along the front face from said connector portion to near said end, with said injection port for the mixture opened in said upstream face, and
- downstream face is provided with a guide for receiving the mixture injected through the injection port for the mixture and guiding said injected mixture outside the notch.
- said upstream face and said downstream face are formed as slanted faces at an angle with respect to each other, flaring from inside to outside of the nozzle body, that said upstream face forms a guide face for allowing the mixture injected through the injection port to flow toward said connector portion, and that said downstream face forms a guide face for guiding the mixture injected through the injection port beyond the notch.
- the nozzle body is provided in at least one of said lateral faces a guide extending from said notch or a location near said notch to near said connector portion for allowing the mixture injected through the injection port for the mixture to flow toward the connector portion.
- said channel for water extends through the nozzle body along said rear face from said connector portion to said end, with said injection port for water being opened in said end.
- the mixture injection port is opened in the upstream face of the nozzle, while the guide for receiving the mixture injected through the mixture injection port and guiding the injected mixture outside the notch is provided on the downstream face of the nozzle.
- the upstream face and the downstream face are formed as slanted faces at an angle with respect to each other, flaring from the inside to the outside of the nozzle body, the upstream face forms a guide face for allowing the mixture injected through the injection port to flow tangentially, and a guide extending from the notch or a location near the notch to near the connector portion is provided in at least one of the lateral faces of the nozzle for allowing the mixture injected through the mixture injection port to flow tangentially.
- the mixture injected subgingivally may be guided subgingivally and discharged efficiently, which improves work efficiency in dental treatment.
- FIG. 1 is a side view of the first embodiment of the nozzle for a dental handpiece according to the present invention, with the main section of the handpiece body.
- FIG. 2 is a side sectional view showing the structure of the nozzle of FIG. 1 with the main section of the handpiece body.
- FIG. 3 is an exploded side sectional view showing the structures of various parts of the nozzle of FIG. 1 with the main section of the handpiece body.
- FIG. 4 shows partially-enlarged perspective views of the nozzle of the handpiece of FIG. 1 , particularly the injection ports for the mixture and water, wherein FIG. 4( a ) is a view seen from the front side of the nozzle, and FIG. 4( b ) is a view seen from the rear side of the nozzle.
- FIG. 5 shows the flow of the mixture injected through the nozzle of FIG. 1 .
- handpiece body 1 to which the nozzle of the present invention is connected has mixture transfer line 11 and outlet 110 thereof for transferring a mixture of air and powder, and water transfer line 12 and outlet 120 thereof for transferring water.
- the mixture transfer line 11 is arranged along the central axis of the handpiece body, and the water transfer line 12 is arranged around the mixture transfer line to form a double tube.
- the handpiece body 1 has head 13 at an end. As shown in FIG. 3 , the head 13 is composed of a substantially L-shaped pipe, and has upstream connection port 14 for connection to the mixture transfer line 11 and the water transfer line 12 , and downstream nozzle connection port 15 for connection to the nozzle.
- the head 13 further has blocking part 16 in the middle between the connection ports 14 and 15 for blocking.
- line 17 for the mixture extends to form part of the mixture transfer line 11 , which line has inlet 171 communicating to the mixture transfer line 11 and the outlet 110 communicating to the nozzle connection port 15 .
- the blocking part 16 is also provided with line 18 for water extending therethrough and offset from the line 17 for the mixture, forming part of the water transfer line 12 .
- the water line 18 connects water channel 19 formed as a circumferential groove in the inner surface of the upstream connection port 14 and the outlet 120 of the water transfer line formed as a circumferential groove in the inner surface of the nozzle connection port 15 , into communication at respectively predetermined axial positions.
- O-ring 10 is disposed in the upstream connection port 14 to make the head 13 water-tight with respect to the water transfer line 12 .
- nozzle 2 A As shown in FIGS. 1 and 2 , nozzle 2 A according to an embodiment of the present invention has connector portion 201 to be connected to the handpiece body 1 , and nozzle body 202 contiguously extending from the connector portion 201 and having a front face, a rear face, two lateral faces, and an end.
- the nozzle 2 A has channel 21 and injection port 210 thereof for transferring the mixture of air and powder, and channel 22 and injection port 220 thereof for transferring water, independent from each other, and adapted to be connected to the handpiece body 1 for injection therethrough water and the mixture of air and powder supplied through the handpiece body 1 .
- the nozzle 2 A is for use in subgingival treatment, and the connector portion 201 is shaped corresponding to the nozzle connection port 15 in the end of the head 13 of the handpiece body 1 , and the nozzle body 202 is formed thin and flat so as to be insertable between the tooth surface and the gingival margin.
- the connector portion 201 is generally in a cylindrical form with an axial dent, and is provided with mixture inlet 211 for passing the mixture substantially in the center of the bottom of the axial dent, and with water inlet 221 for passing water around the mixture inlet 211 .
- the nozzle body 202 is formed thin and flat such that the external width and thickness are gradually tapered from the connector portion 201 , and in this embodiment in particular, formed flat in the transverse direction.
- notch 23 of a substantially rectangular section is cut out from the front face into both lateral faces of the nozzle body 202 , forming upstream face 231 and downstream face 232 .
- the upstream face 231 and the downstream face 232 of the notch 23 are formed as slanted faces at an appropriate angle with respect to each other, flaring from the inside to the outside of the nozzle body 202 .
- the channel 21 for the mixture extends linearly in the axial direction through the nozzle body 202 along the front face from the inlet 211 located in the connector portion 201 down to near the end, and ends in the injection port 210 opened in the notch 23 , in particular in the upstream face 231 , as an outlet.
- the upstream face 231 functions as a guide for allowing the mixture injected through the injection port 210 to flow toward the connector portion 201 , i.e., subgingivally, whereas the downstream face 232 functions as a guide for receiving and guiding the mixture injected through the injection port 210 beyond the notch 23 .
- groove 24 of a semicircular section is formed extending axially from a location near the notch 23 toward the connector portion 201 , and functions as a guide for allowing the mixture injected through the injection port 210 to flow toward the connector portion 201 , i.e., subgingivally.
- the water channel 22 extends axially through the nozzle along the rear face from the water inlet 221 located in the connector portion 201 , and ends in the injection port 220 opened in the end face of the nozzle body 202 as an outlet.
- the nozzle 2 A of such a structure is rotatably connected to the nozzle connection port 15 in the handpiece body 1 via rotary means 3 A of a novel structure.
- the rotary means 3 A includes tubular member 31 which is rotatably arranged at its upstream end in the nozzle connection port 15 in the head 13 of the handpiece body 1 , and fixed at its downstream end to the mixture channel 21 in the nozzle 2 A; mounting member 34 fixed in the nozzle connection port 15 and rotatably receiving the tubular member 31 therethrough; and nozzle attachment 35 fixed in the connector portion 201 of the nozzle 2 A and rotatably receiving the tubular member 31 therethrough.
- the tubular member 31 is rotatably arranged in the nozzle connection port 15 , brought into communication with the outlet 110 of the mixture transfer line, and extends out of the nozzle connection port 15 .
- the mounting member 34 is composed of annular fixing portion 31 fixed in the nozzle connection port 15 , and annular guide portion 33 continuously and integrally formed with the fixing portion 32 .
- the fixing portion 32 has tubular member receiving portion 323 in the center for rotatably receiving the tubular member 31 , and water channel 324 around the portion 323 for communication with the outlet 120 of the water transfer line for water passage.
- the guide portion 33 is in an annular form, and has hollow 330 for guiding water from the water channel 324 of the fixing portion 32 .
- the fixing portion 32 of the mounting member 34 having the structure as discussed above is fixed in the nozzle connection port 15 , while the guide portion 33 is arranged outside the nozzle connection port 15 .
- the tubular member 31 is rotatably inserted through the tubular member receiving portion 323 of the fixing portion 32 and the hollow 330 of the guide portion 33 , and water is passed through the water channel 324 in the fixing portion 32 and the hollow 330 of the guide portion 33 .
- the nozzle attachment 35 on its upstream side is rotatably arranged in the guide portion 33 of the mounting member 34 , and on its downstream side is fixedly fit in the connector portion 201 of the nozzle 2 A.
- the nozzle attachment 35 has tubular member receiving portion 352 in the center for rotatably receiving the tubular member 31 therein to bring the mixture channel 21 in the nozzle 2 A into communication with the tubular member receiving portion 323 of the mounting member 34 , and water channel 353 around the portion 352 for bringing the water channel 22 in the nozzle 2 A into communication with the water channel 324 of the mounting member 34 .
- the mounting member 34 is fixed, in the guide portion 33 of which the nozzle attachment 35 fixedly fit in the nozzle 2 A is fit, and the tubular member 31 is fixedly connected to the mixture channel 21 in the nozzle 2 A through the tubular member receiving portion 323 of the mounting member 34 and the tubular member receiving portion 352 of the nozzle attachment 35 , to thereby connect rotatably the nozzle 2 A to the handpiece body.
- the tubular member 31 which is brought into communication with the outlet 110 of the mixture transfer line in the nozzle connection port 15 in the head 13 of the handpiece body, extends out of the nozzle connection port 15 and is rotatably supported through the mounting member 34 , which is fixed in the nozzle connection port 15 and has the water channel 324 communicating with the outlet 120 of the water transfer line.
- the tubular member 31 is further brought into communication with and connected, via the nozzle attachment 35 , to the mixture channel 21 in the nozzle 2 A, and the nozzle attachment 35 fixed to the nozzle 2 A is rotatably arranged in the guide portion 33 of the mounting member 34 .
- the tubular member 31 forms part of the circuit for introducing the mixture into the mixture channel 21 in the nozzle 2 A
- the water channels 324 and 353 in the mounting member 34 and the nozzle attachment 35 , respectively, arranged around the tubular member 31 form part of the circuit for introducing water into the water channel 22 in the nozzle 2 A, so that the circuit for the mixture and the circuit for water are formed independently from each other.
- the tubular member 31 , the nozzle attachment 35 , and the nozzle 2 A are integrally rotated around one of the two circuits, the tubular member 31 , under the rotational guidance of the guide portion 33 of the mounting member 34 and the nozzle attachment 35 .
- the nozzle 2 A is rotatable independently with respect to the head 13 of the handpiece body 1 .
- the nozzle 2 A may be adjusted to an appropriate angle with respect to the tooth surface by rotation.
- the mixture of air and powder supplied through the mixture transfer line 11 in the handpiece body 1 is injected from the outlet 110 of the mixture transfer line in the head 13 , via the mixture channel 21 in the nozzle 2 A, out of the mixture injection port 210 of the nozzle 2 A.
- the water supplied through the water transfer line 12 in the handpiece body 1 is injected from the outlet 120 of the water transfer line in the head 13 , via the water channel 324 in the fixing portion 32 of the mounting member 34 , the water channel 353 in the nozzle attachment 35 arranged in the guide portion 33 , and the water channel 22 in the nozzle 2 A, out of the water injection port 220 of the nozzle 2 A.
- the water supplied through the water transfer line 12 in the handpiece body 1 is injected from the outlet 120 of the water transfer line in the head 13 , via the water channel 324 in the fixing portion 32 of the mounting member 34 , the water channel 353 in the nozzle attachment 35 arranged in the guide portion 33 , and the water channel 22 in the nozzle 2 A, out of the water injection
- the mixture injected through the mixture injection port 210 of the nozzle 2 A is blown beyond the notch 23 under the guidance of the downstream slant face 232 of the notch 23 facing to the injection port 210 , to ensure that the mixture is blown onto a particular area of the treatment site.
- the mixture injected through the mixture injection port 210 of the nozzle 2 A is also ensured to flow subgingivally under the guidance of the upstream slant face 231 of the notch 23 , in which the injection port 210 is opened, as well as the grooves 24 on both lateral faces of the nozzle 2 A.
- the user when moves the nozzle 2 A along the tooth surface at a treatment site, with the end of the nozzle 2 A inserted subgingivally, may easily adjust the nozzle 2 A at an appropriate angle with respect to the tooth surface at a treatment site by rotating the nozzle 2 A, to ensure that the mixture injected through the nozzle 2 A is blown onto the tooth surface at a treatment site.
- the mixture injected through the mixture injection port 210 may be ensured to be blown onto a particular area of the tooth surface at a treatment site under the guidance of the downstream face 232 facing to the injection port 210 .
- the mixture injected through the mixture injection port 210 is also ensured to flow subgingivally under the guidance of the upstream face 231 , in which the injection port 210 is opened, as well as the grooves on both lateral faces of the nozzle 2 A.
- the nozzle may be inserted into a tiny gap between the subgingival tooth surface and the gum for properly injecting the mixture of air and powder toward a treatment site in subgingival treatment, while the mixture injected subgingivally may efficiently be discharged subgingivally, to thereby improve work efficiency in dental treatment.
- the nozzle 2 A has been described as an example to be rotatably connected to the handpiece body 1 by means of rotary means 3 A composed of the tubular member 31 , the mounting member 34 , and the nozzle attachment 35
- the nozzle may be connected to the handpiece body by means of other rotary means or, in the alternative, may be non-rotatably fixed to the handpiece body, and the connection to the handpiece body may be changed variously.
Abstract
Description
- The present invention relates to a nozzle for a dental handpiece, in particular, a nozzle for a dental handpiece of a type wherein a nozzle is attached to a handpiece body at its nozzle connection port for injection of a mixture of air and powder together with water.
- Dental handpieces are known, which mix air and powder for polishing or cleaning tooth surface, and inject the mixture together with water onto the tooth surface. Dental handpieces of this type are known, for example, from
Patent Publication 1, wherein the dental handpiece is composed of a handpiece body and a nozzle. The handpiece body has a container for accommodating powder, an air supply line for supplying air into the container, a mixture transfer line for transferring a mixture of the powder and air to a nozzle, a water supply line for transferring water to the nozzle, and a head (nozzle connector portion) on which the nozzle is attached. The nozzle has a line and an injection port for each of the mixture and the water for separate injection thereof. The nozzle is inserted onto and fit on the head at the tip of the handpiece body, so that the line and the injection port for each of the mixture and the water through the nozzle are brought into communication with the corresponding mixture transfer line and water supply line in the handpiece body. In this way, the mixture of air and powder supplied through the handpiece body is adapted to be injected together with water through the nozzle. - As a nozzle for injecting a mixture of air and powder together with water, there is known a nozzle for use in subgingival treatment, such as disclosed in Patent Publication 2. As disclosed in this publication, a nozzle for subgingival treatment has a connector portion connected to a handpiece body, and a nozzle body extending from the connector portion toward the end, gradually tapering into a thin and flat form. Through the nozzle body, a channel for transferring a mixture of air and powder and a channel for transferring water are separately provided, extending from the connector portion toward the end of the nozzle body, and a mixture injection port and a water injection port for separately injecting the mixture and water are respectively opened in the end of the nozzle body. Examples of a commercial product that are in practical use for general dental or medical institutions include a nozzle entirely made of a resin and 1.62 mm wide and 0.78 mm thick in its end, or a nozzle entirely made of metal and 1.95 mm wide and 0.91 mm thick in its end.
- These nozzles are connected to the nozzle connector port of the handpiece body by means of various securing means, such as of an insertion or screwing type, so as to transfer water and the mixture of air and powder supplied through the handpiece body through the lines in the nozzle respectively assigned to the water and the mixture, for injection through the respective injection ports during subgingival treatment, as discussed above.
- Patent Publication 1: JP-H10-286268-A
- Patent Publication 2: JP-2008-149138-A
- The nozzles of this type for use in the subgingival treatment are, as discussed above, formed thin and flat, and the mixture channel and the water channel formed through the nozzle are respectively opened in the nozzle end to form a mixture injection port and a water injection port. With such a structure, when a user inserts the nozzle into a tiny gap between the subgingival tooth surface and the gum for injecting the mixture of air and powder, it is difficult for the user to aim the mixture injection port at a treatment site and to properly injecting the mixture onto a treatment site.
- With a nozzle of such a structure, the injection ports in the nozzle end are caught between the subgingival tooth surface and the gum, which make s it difficult for the mixture injected through the injection ports to leave the subgingival area and to be efficiently discharged subgingivally.
- The present invention aims to solve such problems of the prior art. It is an object of the present invention to provide a nozzle for a dental handpiece of this type, wherein the nozzle, when inserted into a tiny gap between the subgingival tooth surface and the gum for injection of a mixture of air and powder in subgingival treatment, may properly inject the mixture onto a treatment site, and efficiently discharge subgingivally the mixture injected subgingivally, to thereby improve work efficiency in dental treatment.
- For achieving the above object, according to the present invention, there is provided a nozzle for a dental handpiece, wherein said nozzle is to be connected to a handpiece body for injection, together with water, of a mixture of air and powder supplied through the handpiece body, said nozzle comprising:
- a connector portion to be connected to a handpiece body, and
- a nozzle body extending from said connector portion and having a front face, a rear face, two lateral faces, and an end, said nozzle body being provided near said end with a notch of a substantially rectangular section cut out from said front face into said lateral faces, said notch forming an upstream face and a downstream face,
- wherein said nozzle has a channel and an injection port thereof for transferring the mixture and a channel and an injection port thereof for transferring water, separate from each other, said channel for the mixture extending through the nozzle body along the front face from said connector portion to near said end, with said injection port for the mixture opened in said upstream face, and
- wherein said downstream face is provided with a guide for receiving the mixture injected through the injection port for the mixture and guiding said injected mixture outside the notch.
- It is preferred that said upstream face and said downstream face are formed as slanted faces at an angle with respect to each other, flaring from inside to outside of the nozzle body, that said upstream face forms a guide face for allowing the mixture injected through the injection port to flow toward said connector portion, and that said downstream face forms a guide face for guiding the mixture injected through the injection port beyond the notch.
- It is also preferred that the nozzle body is provided in at least one of said lateral faces a guide extending from said notch or a location near said notch to near said connector portion for allowing the mixture injected through the injection port for the mixture to flow toward the connector portion.
- It is also preferred that said channel for water extends through the nozzle body along said rear face from said connector portion to said end, with said injection port for water being opened in said end.
- In the nozzle for a dental handpiece according to the present invention, the mixture injection port is opened in the upstream face of the nozzle, while the guide for receiving the mixture injected through the mixture injection port and guiding the injected mixture outside the notch is provided on the downstream face of the nozzle. Thus, when inserting the nozzle into a tiny gap between the subgingival tooth surface and the gum for injecting the mixture of air and powder in subgingival treatment, a user may easily aid the mixture injection port at a treatment site, and properly inject the mixture onto the treatment site, which improves work efficiency in dental treatment.
- Further, in the nozzle of the present invention, the upstream face and the downstream face are formed as slanted faces at an angle with respect to each other, flaring from the inside to the outside of the nozzle body, the upstream face forms a guide face for allowing the mixture injected through the injection port to flow tangentially, and a guide extending from the notch or a location near the notch to near the connector portion is provided in at least one of the lateral faces of the nozzle for allowing the mixture injected through the mixture injection port to flow tangentially. Thus, the mixture injected subgingivally may be guided subgingivally and discharged efficiently, which improves work efficiency in dental treatment.
-
FIG. 1 is a side view of the first embodiment of the nozzle for a dental handpiece according to the present invention, with the main section of the handpiece body. -
FIG. 2 is a side sectional view showing the structure of the nozzle ofFIG. 1 with the main section of the handpiece body. -
FIG. 3 is an exploded side sectional view showing the structures of various parts of the nozzle ofFIG. 1 with the main section of the handpiece body. -
FIG. 4 shows partially-enlarged perspective views of the nozzle of the handpiece ofFIG. 1 , particularly the injection ports for the mixture and water, whereinFIG. 4( a) is a view seen from the front side of the nozzle, andFIG. 4( b) is a view seen from the rear side of the nozzle. -
FIG. 5 shows the flow of the mixture injected through the nozzle ofFIG. 1 . - The present invention will now be explained in detail with reference to the attached drawings. Referring to
FIGS. 1 and 2 ,handpiece body 1 to which the nozzle of the present invention is connected hasmixture transfer line 11 andoutlet 110 thereof for transferring a mixture of air and powder, andwater transfer line 12 andoutlet 120 thereof for transferring water. Themixture transfer line 11 is arranged along the central axis of the handpiece body, and thewater transfer line 12 is arranged around the mixture transfer line to form a double tube. Thehandpiece body 1 hashead 13 at an end. As shown inFIG. 3 , thehead 13 is composed of a substantially L-shaped pipe, and hasupstream connection port 14 for connection to themixture transfer line 11 and thewater transfer line 12, and downstreamnozzle connection port 15 for connection to the nozzle. Thehead 13 further has blockingpart 16 in the middle between theconnection ports - Through substantially the center of the blocking
part 16,line 17 for the mixture extends to form part of themixture transfer line 11, which line has inlet 171 communicating to themixture transfer line 11 and theoutlet 110 communicating to thenozzle connection port 15. The blockingpart 16 is also provided withline 18 for water extending therethrough and offset from theline 17 for the mixture, forming part of thewater transfer line 12. Thewater line 18 connectswater channel 19 formed as a circumferential groove in the inner surface of theupstream connection port 14 and theoutlet 120 of the water transfer line formed as a circumferential groove in the inner surface of thenozzle connection port 15, into communication at respectively predetermined axial positions. O-ring 10 is disposed in theupstream connection port 14 to make thehead 13 water-tight with respect to thewater transfer line 12. - As shown in
FIGS. 1 and 2 ,nozzle 2A according to an embodiment of the present invention hasconnector portion 201 to be connected to thehandpiece body 1, andnozzle body 202 contiguously extending from theconnector portion 201 and having a front face, a rear face, two lateral faces, and an end. Thenozzle 2A haschannel 21 andinjection port 210 thereof for transferring the mixture of air and powder, andchannel 22 andinjection port 220 thereof for transferring water, independent from each other, and adapted to be connected to thehandpiece body 1 for injection therethrough water and the mixture of air and powder supplied through thehandpiece body 1. - The
nozzle 2A is for use in subgingival treatment, and theconnector portion 201 is shaped corresponding to thenozzle connection port 15 in the end of thehead 13 of thehandpiece body 1, and thenozzle body 202 is formed thin and flat so as to be insertable between the tooth surface and the gingival margin. As shown inFIG. 3 , theconnector portion 201 is generally in a cylindrical form with an axial dent, and is provided withmixture inlet 211 for passing the mixture substantially in the center of the bottom of the axial dent, and with water inlet 221 for passing water around themixture inlet 211. Thenozzle body 202 is formed thin and flat such that the external width and thickness are gradually tapered from theconnector portion 201, and in this embodiment in particular, formed flat in the transverse direction. - Near the end of the
nozzle body 202,notch 23 of a substantially rectangular section is cut out from the front face into both lateral faces of thenozzle body 202, formingupstream face 231 anddownstream face 232. As shown inFIG. 4 , theupstream face 231 and thedownstream face 232 of thenotch 23 are formed as slanted faces at an appropriate angle with respect to each other, flaring from the inside to the outside of thenozzle body 202. Thechannel 21 for the mixture extends linearly in the axial direction through thenozzle body 202 along the front face from theinlet 211 located in theconnector portion 201 down to near the end, and ends in theinjection port 210 opened in thenotch 23, in particular in theupstream face 231, as an outlet. Theupstream face 231 functions as a guide for allowing the mixture injected through theinjection port 210 to flow toward theconnector portion 201, i.e., subgingivally, whereas thedownstream face 232 functions as a guide for receiving and guiding the mixture injected through theinjection port 210 beyond thenotch 23. - Referring again to
FIG. 1 , in at least one of the lateral faces, preferably in each of the lateral faces of thenozzle body 202,groove 24 of a semicircular section is formed extending axially from a location near thenotch 23 toward theconnector portion 201, and functions as a guide for allowing the mixture injected through theinjection port 210 to flow toward theconnector portion 201, i.e., subgingivally. - The
water channel 22 extends axially through the nozzle along the rear face from thewater inlet 221 located in theconnector portion 201, and ends in theinjection port 220 opened in the end face of thenozzle body 202 as an outlet. - The
nozzle 2A of such a structure is rotatably connected to thenozzle connection port 15 in thehandpiece body 1 via rotary means 3A of a novel structure. As shown inFIG. 1 , the rotary means 3A includestubular member 31 which is rotatably arranged at its upstream end in thenozzle connection port 15 in thehead 13 of thehandpiece body 1, and fixed at its downstream end to themixture channel 21 in thenozzle 2A; mountingmember 34 fixed in thenozzle connection port 15 and rotatably receiving thetubular member 31 therethrough; andnozzle attachment 35 fixed in theconnector portion 201 of thenozzle 2A and rotatably receiving thetubular member 31 therethrough. Thetubular member 31 is rotatably arranged in thenozzle connection port 15, brought into communication with theoutlet 110 of the mixture transfer line, and extends out of thenozzle connection port 15. The mountingmember 34 is composed of annular fixingportion 31 fixed in thenozzle connection port 15, andannular guide portion 33 continuously and integrally formed with the fixingportion 32. The fixingportion 32 has tubularmember receiving portion 323 in the center for rotatably receiving thetubular member 31, andwater channel 324 around theportion 323 for communication with theoutlet 120 of the water transfer line for water passage. Theguide portion 33 is in an annular form, and has hollow 330 for guiding water from thewater channel 324 of the fixingportion 32. The fixingportion 32 of the mountingmember 34 having the structure as discussed above is fixed in thenozzle connection port 15, while theguide portion 33 is arranged outside thenozzle connection port 15. Thetubular member 31 is rotatably inserted through the tubularmember receiving portion 323 of the fixingportion 32 and the hollow 330 of theguide portion 33, and water is passed through thewater channel 324 in the fixingportion 32 and the hollow 330 of theguide portion 33. Thenozzle attachment 35 on its upstream side is rotatably arranged in theguide portion 33 of the mountingmember 34, and on its downstream side is fixedly fit in theconnector portion 201 of thenozzle 2A. Thenozzle attachment 35 has tubularmember receiving portion 352 in the center for rotatably receiving thetubular member 31 therein to bring themixture channel 21 in thenozzle 2A into communication with the tubularmember receiving portion 323 of the mountingmember 34, andwater channel 353 around theportion 352 for bringing thewater channel 22 in thenozzle 2A into communication with thewater channel 324 of the mountingmember 34. - With such rotary means 3A, in the
nozzle connecting port 15 in thehead 13 of thehandpiece body 1, the mountingmember 34 is fixed, in theguide portion 33 of which thenozzle attachment 35 fixedly fit in thenozzle 2A is fit, and thetubular member 31 is fixedly connected to themixture channel 21 in thenozzle 2A through the tubularmember receiving portion 323 of the mountingmember 34 and the tubularmember receiving portion 352 of thenozzle attachment 35, to thereby connect rotatably thenozzle 2A to the handpiece body. - In this way, the
tubular member 31, which is brought into communication with theoutlet 110 of the mixture transfer line in thenozzle connection port 15 in thehead 13 of the handpiece body, extends out of thenozzle connection port 15 and is rotatably supported through the mountingmember 34, which is fixed in thenozzle connection port 15 and has thewater channel 324 communicating with theoutlet 120 of the water transfer line. Thetubular member 31 is further brought into communication with and connected, via thenozzle attachment 35, to themixture channel 21 in thenozzle 2A, and thenozzle attachment 35 fixed to thenozzle 2A is rotatably arranged in theguide portion 33 of the mountingmember 34. With this structure, thetubular member 31 forms part of the circuit for introducing the mixture into themixture channel 21 in thenozzle 2A, whereas thewater channels member 34 and thenozzle attachment 35, respectively, arranged around thetubular member 31 form part of the circuit for introducing water into thewater channel 22 in thenozzle 2A, so that the circuit for the mixture and the circuit for water are formed independently from each other. Thetubular member 31, thenozzle attachment 35, and thenozzle 2A are integrally rotated around one of the two circuits, thetubular member 31, under the rotational guidance of theguide portion 33 of the mountingmember 34 and thenozzle attachment 35. - In this way, the
nozzle 2A is rotatable independently with respect to thehead 13 of thehandpiece body 1. Thus, when moved along the tooth surface, thenozzle 2A may be adjusted to an appropriate angle with respect to the tooth surface by rotation. - With the
nozzle 2A for a dental handpiece, the mixture of air and powder supplied through themixture transfer line 11 in thehandpiece body 1 is injected from theoutlet 110 of the mixture transfer line in thehead 13, via themixture channel 21 in thenozzle 2A, out of themixture injection port 210 of thenozzle 2A. On the other hand, the water supplied through thewater transfer line 12 in thehandpiece body 1 is injected from theoutlet 120 of the water transfer line in thehead 13, via thewater channel 324 in the fixingportion 32 of the mountingmember 34, thewater channel 353 in thenozzle attachment 35 arranged in theguide portion 33, and thewater channel 22 in thenozzle 2A, out of thewater injection port 220 of thenozzle 2A. As shown inFIG. 5 , the mixture injected through themixture injection port 210 of thenozzle 2A is blown beyond thenotch 23 under the guidance of thedownstream slant face 232 of thenotch 23 facing to theinjection port 210, to ensure that the mixture is blown onto a particular area of the treatment site. The mixture injected through themixture injection port 210 of thenozzle 2A is also ensured to flow subgingivally under the guidance of theupstream slant face 231 of thenotch 23, in which theinjection port 210 is opened, as well as thegrooves 24 on both lateral faces of thenozzle 2A. - As discussed above, the user, when moves the
nozzle 2A along the tooth surface at a treatment site, with the end of thenozzle 2A inserted subgingivally, may easily adjust thenozzle 2A at an appropriate angle with respect to the tooth surface at a treatment site by rotating thenozzle 2A, to ensure that the mixture injected through thenozzle 2A is blown onto the tooth surface at a treatment site. - Further, the mixture injected through the
mixture injection port 210 may be ensured to be blown onto a particular area of the tooth surface at a treatment site under the guidance of thedownstream face 232 facing to theinjection port 210. The mixture injected through themixture injection port 210 is also ensured to flow subgingivally under the guidance of theupstream face 231, in which theinjection port 210 is opened, as well as the grooves on both lateral faces of thenozzle 2A. - Therefore, with the
nozzle 2A, the nozzle may be inserted into a tiny gap between the subgingival tooth surface and the gum for properly injecting the mixture of air and powder toward a treatment site in subgingival treatment, while the mixture injected subgingivally may efficiently be discharged subgingivally, to thereby improve work efficiency in dental treatment. - Incidentally, while in this embodiment, the
nozzle 2A has been described as an example to be rotatably connected to thehandpiece body 1 by means of rotary means 3A composed of thetubular member 31, the mountingmember 34, and thenozzle attachment 35, the nozzle may be connected to the handpiece body by means of other rotary means or, in the alternative, may be non-rotatably fixed to the handpiece body, and the connection to the handpiece body may be changed variously. -
- 1 handpiece body
- 10 O-ring
- 11 mixture transfer line
- 110 outlet of mixture transfer line
- 12 water transfer line
- 120 outlet of water transfer line
- 13 head
- 14 upstream connection port
- 15 nozzle connection port
- 16 blocking part
- 17 line for mixture
- 171 inlet
- 18 line for water
- 19 water channel
- 2A nozzle
- 201 connector portion
- 202 nozzle body
- channel for mixture
- 210 injection port for mixture
- 211 inlet for mixture
- 22 water channel
- 220 injection port for water
- 221 inlet for water
- 23 notch
- 231 upstream slant face
- 232 downstream slant face
- 24 groove
- 3A rotary means
- 31 tubular member
- 32 fixing portion
- 323 tubular member receiving portion
- 324 water channel
- 33 guide portion
- 330 hollow
- 34 mounting member
- 35 nozzle attachment
- 352 tubular member receiving portion
- 353 water channel
- 2B nozzle
- 204 axial dent
Claims (5)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-045879 | 2013-03-07 | ||
JP2013045879 | 2013-03-07 | ||
PCT/JP2014/055657 WO2014136847A1 (en) | 2013-03-07 | 2014-03-05 | Dental handpiece nozzle |
Publications (2)
Publication Number | Publication Date |
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US20160000523A1 true US20160000523A1 (en) | 2016-01-07 |
US10433931B2 US10433931B2 (en) | 2019-10-08 |
Family
ID=51491356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/772,612 Active US10433931B2 (en) | 2013-03-07 | 2014-03-05 | Dental handpiece nozzle |
Country Status (7)
Country | Link |
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US (1) | US10433931B2 (en) |
EP (1) | EP2965708B1 (en) |
JP (1) | JP6449761B2 (en) |
KR (1) | KR102248629B1 (en) |
CN (1) | CN105188595B (en) |
TW (1) | TWI640304B (en) |
WO (1) | WO2014136847A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2019058353A (en) * | 2017-09-26 | 2019-04-18 | 森 彩果 | Oral cavity massage tool, head part for oral cavity massage tool, and oral cavity massage method using oral cavity massage tool |
CN108498196A (en) * | 2018-03-07 | 2018-09-07 | 北京大学口腔医院 | The operation tip and its manufacturing method of ultrasonic subgingival debridement and ultrasonic subgingival debridement device |
CN110884028A (en) * | 2018-09-11 | 2020-03-17 | 杭州四方医疗器械有限公司 | Nozzle assembly of dental blasting machine and machining method thereof |
DE102018126926A1 (en) | 2018-10-29 | 2020-04-30 | Dürr Dental SE | Interchangeable nozzle tip for a dental powder jet device |
ES2942786T3 (en) * | 2019-03-07 | 2023-06-06 | Ferton Holding Sa | Mouthpiece element and dental treatment device having said mouthpiece element |
CN116437868A (en) * | 2020-09-02 | 2023-07-14 | 福尔顿控股公司 | Handpiece, nozzle arrangement and assembly of a handpiece and method for connecting a handpiece to a nozzle arrangement |
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US4276880A (en) * | 1978-09-14 | 1981-07-07 | Oscar Malmin | Cannula and process |
US20060156463A1 (en) * | 2003-03-20 | 2006-07-20 | Tomoaki Kitano | Washing nozzle and toilet device using the same |
US20100167233A1 (en) * | 2007-06-27 | 2010-07-01 | Roland Dricot | Method and tool for creating a perforation or cavity in a bone or bone structure in contact with a membrane |
WO2011057008A2 (en) * | 2009-11-05 | 2011-05-12 | Isolite Systems | Air water vacuum syringe and method of use |
US20110117517A1 (en) * | 2009-11-13 | 2011-05-19 | Dentatek Corporation | Liquid jet apparatus and methods for dental treatments |
WO2011154718A1 (en) * | 2010-06-09 | 2011-12-15 | Astek Innovations Limited | Improved dental nozzle |
US20130266908A1 (en) * | 2010-07-07 | 2013-10-10 | Thierry Casabonne | Nozzle for a polisher |
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DE19714276C2 (en) | 1997-04-07 | 2001-04-19 | Ferton Holding Sa | Dental handpiece |
JP3534698B2 (en) * | 2000-11-30 | 2004-06-07 | 株式会社長田中央研究所 | Nozzle tip for tooth cleaning handpiece |
US20040202980A1 (en) | 2003-04-14 | 2004-10-14 | Policicchio Piero A. | Dental prophylaxis and air appliance |
DE10331583B3 (en) * | 2003-07-11 | 2004-07-15 | Ferton Holding S.A. | Nozzle piece for a dental powder stream device has several nozzle openings formed in the casing surface of the front end of a tubular partial length of the nozzle piece |
DE102006060076B3 (en) | 2006-12-19 | 2008-03-27 | Ferton Holding S.A. | Medicinal handpiece for dental abrasive stream device, has nozzle with nozzle pipe for supplying medically active medium, and supply lines connected with pipe through tight press fitting of nozzle-sided and handle-sided sealing surfaces |
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JP5767021B2 (en) * | 2011-05-26 | 2015-08-19 | 株式会社ナカニシ | Fluid circuit connection structure of dental handpiece |
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2014
- 2014-03-05 US US14/772,612 patent/US10433931B2/en active Active
- 2014-03-05 JP JP2015504365A patent/JP6449761B2/en active Active
- 2014-03-05 WO PCT/JP2014/055657 patent/WO2014136847A1/en active Application Filing
- 2014-03-05 EP EP14760407.8A patent/EP2965708B1/en active Active
- 2014-03-05 KR KR1020157027496A patent/KR102248629B1/en active IP Right Grant
- 2014-03-05 CN CN201480025753.6A patent/CN105188595B/en active Active
- 2014-03-07 TW TW103107890A patent/TWI640304B/en active
Patent Citations (7)
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US4276880A (en) * | 1978-09-14 | 1981-07-07 | Oscar Malmin | Cannula and process |
US20060156463A1 (en) * | 2003-03-20 | 2006-07-20 | Tomoaki Kitano | Washing nozzle and toilet device using the same |
US20100167233A1 (en) * | 2007-06-27 | 2010-07-01 | Roland Dricot | Method and tool for creating a perforation or cavity in a bone or bone structure in contact with a membrane |
WO2011057008A2 (en) * | 2009-11-05 | 2011-05-12 | Isolite Systems | Air water vacuum syringe and method of use |
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US20130266908A1 (en) * | 2010-07-07 | 2013-10-10 | Thierry Casabonne | Nozzle for a polisher |
Also Published As
Publication number | Publication date |
---|---|
KR20150128815A (en) | 2015-11-18 |
KR102248629B1 (en) | 2021-05-07 |
WO2014136847A1 (en) | 2014-09-12 |
US10433931B2 (en) | 2019-10-08 |
EP2965708A4 (en) | 2016-10-26 |
CN105188595B (en) | 2018-06-15 |
CN105188595A (en) | 2015-12-23 |
TWI640304B (en) | 2018-11-11 |
EP2965708B1 (en) | 2017-12-06 |
JP6449761B2 (en) | 2019-01-09 |
JPWO2014136847A1 (en) | 2017-02-16 |
TW201509385A (en) | 2015-03-16 |
EP2965708A1 (en) | 2016-01-13 |
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